NUCLEAR EQUATIONS 0.0 / 5 ? PhysicsAtomic StructureGCSEAQA Created by: MissComfortCreated on: 11-05-17 20:04 What do nuclear equations show? Radioactive decay by using elemental symbols 1 of 14 What form are they written in? atom before decay ---> atom after decay + radiation emitted 2 of 14 One golden rule to remember the total mass and atomic numbers must be equal on both sides 3 of 14 What happens when an atom emits an alpha particle? Its atomic number reduces by 2 and its mass number reduces by 4 4 of 14 Why does the charge of the nucleus decrease when it emits an alpha particle? Because a proton is positevly charged and a neutron is neutral 5 of 14 In nuclear equations, what can an alpha particle be written as? It can be written as a helium nucleus 6 of 14 What happens when beta decay occurs? a neutron in the nucleus turns into a proton and releases a fast moving electron (the beta particle) 7 of 14 When are gamma rays sometimes released? When a nucleus decays by alpha or beta decay 8 of 14 What increase is there on the protons when there is a beta decay? The number of protons in the nucleus increases by 1. This increases the positive charge of the nucleus (the atomic number) 9 of 14 During beta decay, why doesnt the mass of the nucleus change? Because the nucleus has lost a neutron and gained proton (protons and neutrons have the same mass) 10 of 14 What is a beta particle written as in nuclear equations A small "e" with 0 at the top, -1 at the bottom 11 of 14 What happens in both gamma and beta emission? a new element will be formed as the number of protons (atomic number changes) 12 of 14 What do gamma rays do? They get rid of excess energy from a nucleus 13 of 14 Gamma rays dont change what.... They dont change the atomic mass, atomic number or charge of the nucleus/atom 14 of 14
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